Modern Military Operations often employ commercial satellites to fulfill theater capacity requirements.
Currently, military units procure this capability from SOTM vendors such as INSTER Get SAT, EM Solutions, Alico Systems, Boeing, Gilat Satellite Networks, ND SATCOM [1], Comtech Mobile, Datapath, ReQuTech [2], General Dynamics SATCOM Technologies, iDirect,[1] Inmarsat (BGAN), L3, Raytheon, Exelis, Step Electronics Australia [3] or ViaSat.
More recently Spectra Group (UK) Ltd has introduced SlingShot - a lightweight unit that converts existing tactical radios to SATCOM frequencies, offering a straightforward and cost-effective way to achieve tactical, secure, satcom on the move for those using UHF and VHF radios Comparison between these systems is difficult due to the differences between the technologies and service offerings.
For example, both China and Russia have or will have capability to take out American or European satellites in case of war.
Note the Marines fielded a static command center which is basically limited by line sight radios.